Rarer than the Pianet N and using rubber pluckers rather than sticky pads the Cembalet has a subtly different sound and feel. It was Ernst Zacharias' first keyboard to go into production with Hohner. Below is a video of the Cembalet 1 I recently completed for Soundgas.
The main issue seems to be grounding, I used 3 metres of desoldering braid wound around the key shafts and damper arms. There is still some strange harmonic floating around this Cembalet, possibly caused by an issue within the preamp.